Certainly! Let's break down the provided code snippets:

1. What is it and why is it used?

In Mongoose, a schema is a blueprint for defining the structure of documents within a collection. When you define a schema, you can also attach methods to it. These methods become instance methods, meaning they are available on the individual documents (instances) created from that schema.

Instance methods are useful for encapsulating functionality related to a specific document or model instance. They allow you to define custom behavior that can be executed on a specific document. In the given example, the findSimilarTypes method is added to instances of the Animal model, making it easy to find other animals of the same type.

2. Syntax:

Using methods object directly in the schema options:

javascript const animalSchema = new Schema( { name: String, type: String }, { methods: { findSimilarTypes(cb) { return mongoose.model('Animal').find({ type: this.type }, cb); } } } );

Using methods object directly in the schema:

javascript animalSchema.methods.findSimilarTypes = function(cb) { return mongoose.model('Animal').find({ type: this.type }, cb); };

Using Schema.method() helper:

javascript animalSchema.method('findSimilarTypes', function(cb) { return mongoose.model('Animal').find({ type: this.type }, cb); });

3. Explanation in Simple Words with Examples:

Why it's Used:

Imagine you have a collection of animals in your database, and you want to find other animals of the same type. Instead of writing the same logic repeatedly, you can define a method that can be called on each animal instance to find similar types. This helps in keeping your code DRY (Don't Repeat Yourself) and makes it easier to maintain.

Example:

```javascript const mongoose = require('mongoose'); const { Schema } = mongoose;

// Define a schema with a custom instance method const animalSchema = new Schema({ name: String, type: String });

// Add a custom instance method to find similar types animalSchema.methods.findSimilarTypes = function(cb) { return mongoose.model('Animal').find({ type: this.type }, cb); };

// Create the Animal model using the schema const Animal = mongoose.model('Animal', animalSchema);

// Create an instance of Animal const dog = new Animal({ type: 'dog', name: 'Buddy' });

// Use the custom method to find similar types dog.findSimilarTypes((err, similarAnimals) => { console.log(similarAnimals); }); ```

In this example, findSimilarTypes is a custom instance method added to the Animal schema. When you create an instance of the Animal model (e.g., a dog), you can then call findSimilarTypes on that instance to find other animals with the same type. The method uses the this.type property, which refers to the type of the current animal instance. This allows you to easily reuse the logic for finding similar types across different instances of the Animal model.

• for: stats - oil and gas industry - steep drop in production

• stats - oil and gas industry - steep drop in production

  • no new fields can be developed to meet a 1.5 Deg C scenario
  • any new developments face the certain risk of being a stranded asset
  • by 2040, 7 million less barrels of oil are produced each day to meet a 1.5 Deg C scenario

• for: Michael Levin, Michel Bitbol, Karl Friston, Chris Fields

• comment

  • Recommend adding Michel Bitbol to the next talk between these researchers.

• reference

  • https://hyp.is/go?url=http%3A%2F%2Fdocdrop.org%2Fvideo%2FbzPu_USZ-0o%2F&group=world

| physics/mathematics | Classical Physics | Quantum Mechanics |<br /> |---|---|---|<br /> | State Space | fields satisfying equations of laws<br>- the state is given by a point in the space | vector in a complex vector space with a Hermitian inner product (wavefunctions) |<br /> | Observables | functions of fields<br>- usually differential equations with real-valued solutions | self-adjoint linear operators on the state space<br>- some confusion may result when operators don't commute; there are usually no simple (real-valued) numerical solutions |

https://ymlaenwelsh.com/2018/11/11/on-word-field-farming/

Creating world fields (groups of words related to a particular area or field of knowledge) can be helpful for acquiring vocabulary in a new language. There's no research here to back up the claim, but it's an interesting word game and method for familiarize oneself with a small area and acquire new words related to an area or various related stem words.

Electric Field

EPE

so quantities that are what? vague?

https://go2hy-my.sharepoint.com/:i:/g/personal/juan_wen_haileybury_vic_edu_au/EYFHG7qufD1Gq2KS57xt4aABYWojdieiEPx3vESwWj62GQ?e=GdA73R

a tree (data structure) is the computer science analogue/dual to tree structure in mathematics

Ke. Q., (2006). Interdisciplinary research and technological impact. Computer Science Digital Libraries Cornell University. Retrieved from https://arxiv.org/abs/2006.15383.

Storyspace used a scripting language to create what they called "Guard Fields" — boolean logic that will make a link clickable or not based on the pages the reader had already visited up until that point.

What is interesting is that guard fields proved effective at breaking cycles (one of the risks of disorientation in hypertext).

Not clear whether it could (easily) be used "standalone" — without any child checkboxes.

https://html.spec.whatwg.org/multipage/input.html#checkbox-state-(type%3Dcheckbox)

https://material.io/components/selection-controls/#checkboxes

So the main thing this gives us is a way to set indeterminate property of input via an indeterminate property?

This is misnamed. Doesn't actually give us a tri-state checkbox. Just a binary checkbox.

So the main thing this gives us is a way to set indeterminate property of input via an indeterminate property?

Not sure how that supposedly gives us a tri-state checkbox.

Rhetoric, too, is a supra-disciplinary field, to the extent that it's sometimes mistaken as not even having a 'subject' (re: the protest that you can't teach writing until students have enough of a subject to write about under their belts first).

The happy fields were the Elysian fields where a select few, favored by the gods, got to go after death, whereas most people went to Hades (NOT hell, but not pleasant either).